DOS version: there are 3dfx_win.bdd and 3dfx_dos.bdd with the glide code. Plus myst_win.bdd, rade_win.bdd etc. BRender SDK traces?Can't find a way to force the 3dfx renderer in the DOS version.No info about the 3dfx support in readdos.txt.

WIN version: not installs *.bdd. There is no grGlideInit in motormsh.exe and in the game directory...Supports ddraw or d3d (directdrawcreate call in *.exe).There is something about 3dfx in readwin.txt but looks like the game uses Voodoo through directx.